Punnett Squares
Word Problems
Vocabulary
Random
Class Notes
100
Complete a punnet square for TT and tt.
What is Tt, Tt, Tt, Tt
100

Parent #1 has a big nose. His genotype is GG. Parent #2 also has a big nose. Her genotype is Gg. What are the possibilities for their children's genotypes?

What is GG, GG, Gg, Gg

100
___________ is the passing down of traits from one generation to the next.
What is Heredity.
100
Hh, Zz, Xx. Each of these are _______________.
What is heterozygous.
100
The method we use today to predict the traits of offspring is ________________ .
What is the Punnett Square.
200
Complete a Punnett square for Gg and Gg.
What is GG, Gg, Gg, gg
200

Parent 1 is homozygous for brown hair. Parent 2 is homozygous for blonde hair. Brown hair is dominant to blonde hair. What are the possible genotypes for their children?

What is Bb, Bb, Bb, Bb.

200
A pair of alleles that are the same are called __________________.
What is homozygous.
200
HH, TT, zz. Each of these are ______________________.
What is homozygous.
200
Capital letters are always represented by the _____________ allele, not the recessive allele.
What is dominant.
300
Complete a Punnett square someone who is heterozygous for tall and for someone who is homozygous for short.
What is Tt, Tt, tt, tt
300
Mike is heterozygous for brown eyes. His wife has blue eyes. What percentage of their children will most likely have brown eyes? What percentage will most likely have blue eyes?
What is 50% brown and 50% blue eyes?
300
A pair of alleles that are different are called ____________________.
What is heterozygous.
300
Jim and Jane are both heterozygous for being tall. What are the chances that they will have a short child?
What is 25% chance.
300
A _______________ trait is a trait that is expressed or shown.
What is dominant.
400
Complete a Punnett square for someone who is Homozygous for green eyes and someone who has blue eyes. Green is dominant over blue.
What is Gg, Gg, Gg, Gg.
400

Two dogs have dark hair, but each of them carry a recessive trait for light hair. What are the chances that their offspring will have dark hair? Light hair?

What is 75% dark hair and 25% light hair.

400
___________________ describes a pair of alleles and is represented by letters such as Tt or TT.
What is genotype.
400
GG, Gg, Gg, gg. Green eyes are dominant to blue eyes. What percent have green eyes? What percent have blue eyes?
What is 75% and 25%.
400
A ______________ trait is a trait that is hidden by the dominant gene.
What is recessive.
500
The four answers for a Punnett square are Zz, Zz, zz, zz. What are the genotypes for the parents?
What is Zz and zz.
500

James is homozygous for brown eyes. His wife also has brown eyes, but one of their children has blue eyes. What is his wife's genotype?

What is Bb.

500

__________________ is simply the expression of the genotype. It is how the trait is expressed (ie. dark hair, tall, green eyes, etc.)

What is phenotype.

500
Write a word problem that will have the following results: The children have a 50% chance of having straight teeth and a 50% chance of having crooked teeth.
What is....
500
What is the first name of the early 20th century scientist who introduced Punnett Squares as a method to predict the traits of offspring?
What is Reginald.
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